Signal device



FIG. 1 is a perspective view of a signal device showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view with the left side being a mirror image thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front elevational view of the signal device; and,

FIG. 8 is another front elevational view thereof.

In the drawings, the broken line showing of a lamp segment depicts environmental subject matter and forms no part of the claim. 

The ornamental design for a signal device, as shown and described. 